Out in Spokane it's mostly mushrooms in the spring or autumn. There are wild alliums, too. Look specifically at Spokane foraging and see if you can find a mycelium hunters group on Facebook or something.

You'll have to get out of the city to do some good foraging as Spokane itself is kind of gross. Try out north near Green Bluff or west in Cheney. You can find a lot of resources on indigenous gathering in the area for some inspiration.